Portable flash-light



K. A. CANTIN.

PORTABLE FLASH LIGHT.

AIILIC/HIUH rlufu MAIL 22!. mm.

Patented Aug. 19, 1919.

v UNITED STATES PATENT QFFICE- A. sum, osironoLU'L irnaarrony or HAWAII,I

rostrum FLAS -Liens.

To all whom it may concern:- 7 a Be it known" that I, :KENNETH A.CANTIN,

a citizen of the United States, residing at Honolulu, in the Territoryof Hawaii, have invented certain new and useful Improve ments inPortable Flash-Lights; and I do hereby declare the .following to be afull, clear, and exact description of the inventlon, such as will enableothers skilled in the art to which it appertains to make and use thesame.

. The present invention relates to new and useful improvements inportable flashlights of that general type including a lamp carrymgcasing in which a battery is removably housed.

It is primarily the object of this invention to embody a variableresistance in the lamp circuit of a flashlight, whereby the intensity ofsaid light may be varied at will.

It ismore particularly an object to incorporate a. rheostat element inflashlights of the conventional nature, in a most economical manner, andWithout adding materially to the size or general proportion of theflashlight.

\Viththe above and other objects and advantages in view, the inventionresides more particularly in the novel combination, formation andarrangement of parts hereinafter specifically described and pointed outin the appended claims.

In the accompanying drawing Figure 1 is an elevational view of aflashlight embodying the present invention,

Fig. 2 is a verticallongitudinal sectional View therethrough, I

Fig. 3 is a transverse sectional view therethrough on the line 3-3 ofFig. 2

Fig. 4Eis a diagrammatic view of the lamp circuit.

Referring now more particularly to the accompanying drawings, there isprovided a main tubular casing 5 which has a removable cap 6 at one endfor retaining the usual battery this sheet is a'coil 13 formingtherheostat. Wrapped about said: coil is a secondsheet of insulatingmaterial 14,- and disposed} about and inclosing-the second sheet of material to present a finished appearance to the'structure is aftubularcasing 15 which has one end extended past; the open end of Specificationof Letters Patent.

7 in the casing, and which is open. at its. other. end. A sheet ofinsulatin material 12 is wrapped about the open en portion of the maincasing, and wound upon P e e Aug-19,19 199. Application am: March 2a,1918. Serial No. 225,270. 5

- the main casing andcarrying a cllPpedTe- 1' flector, 8 insulatedtherefrom and provided 3 with a socket receiving the usual lamp 10:

A bulls eye is disposed at the mouth of the reflector. One side of thiscasing 15 is struck.-

outwardly f longitudinally, of the axis there-' of to form an elongatedtrough shaped projection 16. Slidableina longitudinal slot 17 nthisprojection is-a spring finger 18, which carries outwardly of thewall of the projection a button 19, and which, at its inner end, isslidably engageable with se lBOtD G convolutions of the wire 12 througha longitudinal slot 20 formed in the insulating sheet 14:. One end ofthe rheostat coil 12 connects, as shown more particularly in Fig.11,with the lamp receiving socket. The

other end of the rheostat has no electrical ing 5 for contact with thecap 6, it being observed that the button 19 and spring pin 18 form theusual means for efiecting a connection between the main casing and thebattery contact 21. In the present structure, the sli'dable mounting forthe push button is merely elongated so that the button may slide, overthe coils of the rheostat. Thus a. rheostat element is embodied in theflash-- light without affecting the size or proportion of the generalstructure thereof.

' Tracing the lamp circuit, the current passes from the usual end'pole22 of the battery through the lamp by the usual direct contact. From thelamp socket the current passes through the rheostat coil 12, and fromthence thgough the" spring finger18 to the main casing, from whenceitpasses through the connection 21 back into the battery. Thus when thespring finger is push'ed to one endof the'slot 1?, and out of-contactwith any of the rheostat coils', the circuit is broken. v 1

v What is claimed, is,

1. In. a portab le flash light including a batterymeceiving casing and alamp carried thereby, a resistance member 'woundjabout the casing andinsulated therefrom, an outer casing surrounding the rheostat member andinsulated therefrom, a contactmember slid- .ably' carried bys'aid-outercasing for selective engagement with the convolutions oftherheostatmember and an electrical connection between'the casings.

battery receiving casing 2. In a portable flash light including a am alamp carried thereby, a sheet of insulation'wrapped about the casing, aresistance member coiled about said insulation, a second sheet ofinsulation wrapped about the resistance member and provided with alongitudinal slot an outer casing disposed about the secon sheet ofinsulation, a contact member slidably carried by said outer casin andengageable.

with the resistance member through said slot, and an electricalconnection between the casings.

3. In a portable flash li ht including a battery receiving casing an a'lamp carried thereby. a sheet of insulation wrapped about ,the casing, aresistance member coiled about side to form a trough like slottedKENNETH A. CANTIN. \Vitnesses: I

J. M. LEvY', T ios. P. CUMMINS.

